Feeding mechanism.



B. MQW HANSON. FEEDING MECHANISM.

APPLICATION FILED APR. 20, 1909.

Patented Nov. 23, 1909.

S-SHBET l.

B. M. W. HANSDN. FEEDING MECHANISM.

AYPLIOATION 11.21) APR. 20, 1909.

Patented Nov. 23, 1909.

' 4SHBETS-SHBET 2.

1120012 tar: Wfianson B. M. W. HANSON.

v FEEDING MECHANISM. APPLICATION FILED APR. 20, 1909.

Patented Nov. 23, 1909.

By his Attorneys,

B. M. W. HANSON. FEEDING MECHANISM.

a APPLICATION FILED APR. 20, 1909.

94 9 Patented Nov. 23, 1909. Y v I 4 SHEETS-SHEET 4.

Fig. 4 y I pairs STATES PATENT oration.

BENGT HANSON, OF HARTFORD, CONNECTICUT, ASSIGNOR TO PRATT & WHITNEYCOMPANY, OF HARTFORD, CONNECTICUT, A CORPORATION OF NEW JERSEY.-

FEEDING MECHANISM.

Specification of Letters latent.

Patented Nov. 23, 1909.

Application filed April 20, 1909. Serial No. 491,101.

To all whom "it may concern:

lie it known that I, BnNo'r M. W. HANSON, a citizen of the UnitedStates, residing at Hartford, in the county of Hartford and State ofConnecticut,- have invented certain new and useful Improvements inFeeding ll'lechanism, of which the following is a specification.

This invention relates to what I shall for convenience term feedingmechanisnn,

Feeding mechanism comprising my invention is susceptible of,advantageous use in many different connections although it is ofespecial utility when employed in conjunction with or forming part of agrinding machine as represented in the accompanying drawings wherein Iillustrate in detail one form of embodiment of the invention.

' For the purpose of enabling those skilled in the art to practice theinvention I will fully set forth in the following description said formof embodiment while the novelty of the invention will be included in theclaims succeedin said description.

From the statements just made it will be clear that I"do not restrictmyself to the disclosure made by said descriptionand drawings as manyvariations therefrom may be made within the scopeof my claims; some ofthese will be specifically referred to while others may be inferred. Iprovide a mechanism effective in nature by which both rapidity andaccuracy can be assured.

Referring to saiddrawings, Figure 1 is a sectional front elevation offeeding mechanism involving my mechanism showing the same associatedwith a grinding machine also represented in sectional front elevation.Figs. 2 and 3 are sectional frontelevations of said feeding mechanismshowing the parts thereof in different positions, Fig. 2 being somewhatdiagrammatic and showing a feele and certain cooperating devices of saidrindin machine. Fi '4: is a sectional to plan view of said feedingmechanism. Fig.

5 is a top plan view of'a magnet, its arma-' ture and certain adjunctivedevices, and, Fig.

6 is a detail view of the said magnet'and its armature the latter beingin section.

Said views are on different scales while throughout them parts.

I. have represented in certain figures of the drawings portions ofagrinding machine like characters referito like.

of known construction with which my feeding 'mechanism successfullycoiiperates and so that the action and advantages of said feedingmechanism may be better understood I will describe in brief saidgrinding machine.

The framework of the machine is denoted in a general way by 2 and it ismade in the form of a bed to receive the carriage 3 the latter in thepresent case moving longitudinally of said bed. In addition to saidcarriage 3 there is a second carriage which I do not deem it necessaryto show but which in practice reciprocates on said bed crosswisethereof. The carriage 3 usually supports the work which I have denotedbye and said work is given a rotary movement while the carriage whichsupports the tool 5 is given an' lntermittent or step by step advancingmovement toward the work so that when a piece is being ground thecarriage is being fed longitudinally of the bed 2 while the toolcarriageis being progressively -moved transversely of'the bed. so as to eifectthe reduction of the work' to the predetermined size. There may be caseswhere I 'might rearrange the parts of the grinding machine but I preferthatthey be related in the manner set forth.

My feeding mechanism involves several salient features one of themincluding ratchet-wheel mechanism, primary and secondary pawls forgiving to the ratchetwheel mechanism different degrees of move ment, anda device progressively movable with said ratchet-wheel mechanism forthrowing the pawl out of action saiddevicebeing also manually settableand thisicombination of parts provides a means whereby the number ofsteps to be taken by the sec ondary pawl, after the primary pawl hasbeen thrown out of action can be regulated with certainty andpreciseness'. In other words I can determinedefinitely how many stepswill be taken by the secondary andwhich is an important result. Inconpmction with the elements stated or their equivalents I prefer .torovide means for preventing said device rom moving beyond the point .atwhich it throws the primary pawl out of action so that for example afterhaving ground down one piece of work I can without changing anyadjustment repeat the operation with a similar piece of work. I

7 wish to make it clear that i use the 't'erm feired may be connectedwith the "ratchet--wheel mechanism in its generic sense to include oneor more ratchet-wheels although a sin le ratchet-wheel as willhereinaiter appear has its peculiar advantages.

The ratchet-wheel to which I have reriagc in any desirable manner anditwill be evident that each time the ratchet-wheel is operated thetool-carriage is advanced a corresponding extent, it being also obviousthat the said tool-carriage is initially given a series of coarse stepsand finally aseries of fine steps although it is conceivable that theremight be but one of each of said steps.

A ratchet-wheel such as satisfactorily answers my purpose is shown inthe drawings being denoted by 6 and being laterally graduated as at 7the graduated surface presenting an easy means for properly locating thewheel or for positioning a throw-out device as will hereinaftermore'fully appear. Said ratchet-wheel 6 is rigidly fastened in somesuitable mannerto the shaft (3' rotatively supported b the framework ofthe machine, and from w ich through the intervention of suitable meansthe tool-carriage receives its advancing motion.

In connection with said ratchet-wheel 6 I pawl as 8 and secondary ,pawlsas 9 and 10 althou h it is not essential provide a primary that twosecondary pails be provided although by providing two of such pawls anddisposing one so that it will operate the ratchet-wheel in advance ofthe other or vice versa 1 can secure the advantage of a ratchetwheelhaving much finer teeth than the one shown. As will be obvious I canobtain with a finer toothed-ratchet than that shown and asinglesecondary'pawl a fine feed. but I can secure the same result by havingthe awls related in the manner indicated. The

egrees of movement of tld: pawls 8 and 9- and 10 are difierent that ofthe pawl 8 being greater than that of the secondary or'sup- .plementalpawls 9 and 10 the former being employed to secure the initial or coarsefeed of the tool carriage while the secondary pawl or (pawls areutilized for obtaining the final an fine feed of the said carriage.

The. carrier for the primary pawl is'denoted bv 11 while that for thesecondary pawls is designated by 12 and while the particular mounting ofthese carriers is'not a riers are loose on the shaft 6.

flmatter of consequence I prefer that they be oscillatory. In thepresent case said car- As will here: matter appear the secondary pawlcarrier 12 is operated by or from the primary pawl carrier 11 so thateven after the pawl 8 is thrown out of action the carrier 11 canremainin motion and thereby actuate the carrier l2. 1

I will now describe the means for operating the primary pawl carrier andlicrcintool-carceases after indicate more fully how the secondaryvcarrier is operated from the primary or main pawl carrier. r.

In practice the carriage 3 is provided with with two tappets or dogsonly one of which is shown being pets alternately strike and swing therocker 14 the pivot or center of which is designated by 15. Said rockeris shown as equipped with a rigid segment or sector 16 the teeth ofwhich mesh with a pinion 17 with which a crank arm 18 is rigidlyconnected. To the outer end of said crank arm I have represented aspivoted a connecting rod 19 having a loose connection with the main pawlcarrier 11. The body of the rocker 14 is preferably made hollow toreceive a spring plunger 20 against which the push spring 21 0peratesthe upper end of said spring bearing against the plug 21' closing theupper end of the body of said rocker and which plug in the present caseis alternately engaged by said tappets. On the framework is a rockarm 22the upper oppositely beveled portion of which cocperates with asubstantially similar portion at the lower end of the spring plunger 20byreason of which as said rocker 14 is'swung the-spring 21 will becompressed to carry said The mechanism between the tappets and therock-arm 22 iscommon for which reason it is not necessary for me todescribe the same in detail; It will be apparent, however, that by saidmechanism the rod 19 will be reciprocated as the work-supporting carriage 3 travels back and forth. 1 have shown by full lines the rocker 14and rod 19 in one extreme position and by dotted lines the other extremeposition and the intermediate position. ,As the rod 19 is moved to theright in the present case the carrier 11 will be correspondinglymovedand on this stroke of said carrier the awl 8 carried thereby iseffective for feeding the ratchetwheel 6 while on the return or backstroke of said carrierll said pawl 8 rides the teeth of saidratchet-wheel. I might state at this point that the advancing movementof said carrier 11 is effected by power while the return stroke issecured by the weight of the said cat rler itself; in other words saidcarrier is self-active on its return movement it havin sufficient weightto insure this action. The swing or stroke of the carrier 11 can begoverned manually so as to regulate the number of teeth that the primary pawl 8 covers in one operation or to define thev amount of movementof the ratchet-wheel 6 and thereby control the step feed of thetool-carriage. For this purpose I may provide a stop as 24 shown as ascrew, extending through :1 lug 25 on the housing or boxing 26 supportedby the framing 2. By running said screw up or denoted by 13 and thesetaprocker over the center.

idly over 1 mary pawl carrier 11 can be governed. The

stop screw 2% may be engaged b a springplunger or buffer 27 on said rocer by re son of which shock or jar will be eliminate on the-back strokeof said rocker 11 durin which the inotion thereof is somewhat acceerated.

The main carrier 11 is shown as having a projection 28 cooperating witha projection 29 on the'secondary or supplemental carrier 12 saidprojection 29 being in the path of the projection 28 and the twocarriers are so jection 29 and thereby drive the secondary related thatwhen the main carrier 11 has practically completed its forward strokethe projection 28 will impinge against the proor auxiliary carrier 12forward so that the sdcondary pawls 9 and it) can perform theirfunctions. It Wlll be ev dent that the main or primary carrier 11 movesthrough a relatively considerable arc with respect to't-he secondary.carrier 12 the consequence being that the degree of movement of themain or primary pawltl is much greater than that of the secondary orauxiliary pawls 9 and 10. The amount of stroke of the secondary orauxiliary pawl carrier 12. may be also controlled and for this purposean adjustable stop as 30 may be provided. said stop'being shownas ascrew tapped. through some relatively fixed part of the machine andadapted to engage an extension 31- of suid'carrier 12. Said extension 31is also coiiperative with a spring-plunger 32 the spring -33 of whichfurnishes the power for retracting the carrier 12 in a rapid manner. Thespringplunger .32 in the present instance bears at 'alhtimes againstsaid extension andin aFig.

3-the latter. is shown as bearing against the lower end of the stop 30both carriers 11 and 12 being in their retracted pos tions. When thecarrier 11- has advanced the carrier 12 in ellected by lifting saidprimary pawl out of tip tel

engagement with the teeth of the ratchetwheel but whcu the pawl is thuslifted the motion of the carrier 11.is not stopped as the movement ofsaid primary carrier is utilized to effect tl e rocking of the secondarycarrier as'w'rll be obvious.

Loosely supported by the shaft 6 is a sleeve 34 provided with a radialarm 35 and with a stem or stud 31S encircled by a' push spring 37hearing at one end a ainst' a shoulder 37 on said stem and at'tie otheragainst a sleeve 38 with which is integral a segment or shoe 89 saidsleeve being slidable upon said stem or stud 36. The outer surface oftlns shoe is pressed against the inner surface of the annularott-standlngiiange or bead 40 of the rntchet-wheel 6, the frictionalengagement between the ratchet-wheel and shoe being sufiicient as tocarry the shoe and its associated parts around with said ratchet wheelwhen the latter is turned. The outer end of the stem or stud 36 issomewhat on larged and to this enlarged portion I fasten as byscrews 41the shield 42 which is shown as consisting of a longitudinally curvedplate and the length of which is practically equal to the maximum strokeof the pawl b. The sleeve 34 is provided with a balance weighted arm 43so that said sleeve and the rts associated therewith have no tendency inthemselves to inove. Said sleeve 34 and said assoclated parts present athrow-out.

device for the primary pawl and such throw" out device as will beapparent moves progressively with the ratchet-wheel (3. Owing to itsmounting it may be set by hand so that the point at which the primarypawl is to be thrown out of act-ion can be precisely 'overned; Thereforeone of the. important features of the invention is a throw-out devicefor putting a pawl outof action which moves progressively orintermittently with the ratchet-wheel 'meclnrnism' and -which is alsocapable of manual setting whether said throw-out device be connectedwith said.

ratchet-wheel or not although by making such connectionexcellent'results are secured.

Said throw-out device can be swung around relatively to theratchet-wheel and the pawl lifting plate or shield 42 can be positionedto lift the pawl .8 after the ratchet-wheel 6 has made any predeterminednumber of strokes.

As will be. evident the three pawls 8, 9 and 10 operate the teeth of theratchet-wheel but the transverseextent of the shield is suflicient toaffect only the primary pawl 8. It Wlll be assumed.that tl1e operator ofthe machine hasso adjusted'the shield 42 that it occupies the positionshown in Fig. 2, and

that the machine is thereafter put into moq tion. ,On each movement ofthe ratchetwheel 6 the shield is moved a corresponding distance. Whensaid shield strikes the pri mary pawl 8 the latter will be lifted out ofengagement with the ratchet-wheel (5. In connection with a throw-outdevice of the character set forth orits equivalent I provide means forpreventing said throw-out device moving beyond the point at which thesaid throwsout device puts the primary pawl out of'action and I willhereinafter describe a means for securing this result. By virtue ofthisorganizationl can a'ccuratel repeat a previous operation which I coalnot do were the shield or its equivalent movedbeyond "the-point atwlrichit rendered the primary pawl inellective. The means for arresting thepawl throw out device, shown in the drawings consists of a screw 45whereby adjustability is obtained and this screw is shown as tappedthrough a part of a movable member as 46 and an advantage for thisparticular mounting of said stop or screw will be hereinafter pointedout. The member 46 it should be stated is normally at rest or has nomotion during the time the pawl 8 is in etlective operation and for atime subsequent thereto. The lower end of'said screw 45 cotiperates witha projection or lug 46 on the arm'35 constituting part of r the pawlthrow-out device.

I deem it proper at this point to refer in part to the operation of themachine. It-

will be assumed that a piece of work is to be ground down to a certainsize. In this event a gage-piece corresponding exactly in diameter withthat which the piece of work when finished, is to have is mounted on thework-carriage just as the work would be and the feeler hereinafterdescribed is placed against the periphery of the work. The tripping orreleasing mechanism which throws the auxiliary or secondary pawls out.

of action is then adjustedafter which the rocker 14 is swung over to theleft in Fig. 1 thereby through the intermediate parts. advancin bothcarriers 11 and 12 to-the limits respectlvely of their forward strokesthe two carriers being in the position then which they would occupyafter the work had been sized or at the conclusion of the last step or"the final or fine feed. Of course the several pawls 8, 9 and-1O arelifted out of engage ment with the ratchet wheel 6 on this adj ustment.The screw 45 prior to this time will it necessary be backed out. Thepawls are then permitted to fall into engagement with the ratchet wheelfollowing which the shield 42 is moved forward until it liftsthe pawl 8out of engagement with the ratchet-wheel. The distance then between thetip of front end'of the shield 42 and the primary pawl 8' will be knownand this interval indicates the number of steps the ratchet-wheel 6 willbe fed by the secondary or auxiliary pawls after the'primary pawl hasbeen thrown out of action. Therefore in this way the exact amount ofmovement of the ratchet wheel under the final feed pawls can beregulated at will. WhenIthe regulation has been made the screw 45Will berun down until it engages the lug 6 after which the parts will be putinto action which means that the primary pawl is thrown out of action aknown number of teeth before the secondary pawls are rendered inactiye'and also that this operation can be repeated again with unfailingaccuracy by providing the means which prevent the movement of thethrow-on device beyond its pawl throwing out ad'ustmer t; Therefore Ican regulate not only the t point at which the coarse feed ceases or theexact amount of fine feed but can accurately repeat an operation whichis important when it is desired to grind down several pieces of similarwork to a standard size. While the arresting of the pawl throw-outdevice is highly important there may be cases where this feature mightbe omitted.

The pawl 8 '18 shown as rigidly fastened to a pivot! or pin 48 supportedfor rocking motion by a bearing 49 extending laterally from the carrierll'said pin rigidly carrying .at its inner end a tail-piece 50 ofbeveled.

shape and cotiperative with a similarly formed portion at the upper endof the spring plunger 51- carried by said carrier 11. said springplunger presenting an automatically operative latch for holding the pawl8 either down (its effective position) or up said pawl being. providedwith a pin 52 by which it can be more readily manipulated.

The pawl 9 is preferably rigid with a pin or pivot 53 supported forrocking motion by a bearing 54 on the carrier 12 while-the adjacent pawl10 is loose on said pin or pivot 53. The points of said two pawls are soset that one of them operates in advance of the othera half tooth. Fromthe inner or loosely mounted awl 10 there extends outward a stud 55which profects freely into a hole 56 in the com anion pawl 9 whereby acertain amount 0 relative movement of said two secondary pawls ispermitted alv thdugh as will hereinafter appear they can be thrown outof action together. From the pin53 there extends the tail-piece 57 andthis provides a simple means in connection with a suitable knock-oft"device for simul-. taneously throwing the two secondary pawls out ofaction. The loose connection between said pawls it might be explainedpermits their free-up and down relative movement although both areadvanced as one or in synchronism. By depressing the tail-piece 57 bothpawls 9 and 10 will be lifted free of the ratchet-wheel in unison, andmeans for securing this result will he hereinafter described. I havealluded hereinbefore to a work-engaging feeler. This feeler through theagency of suitable mechanism throws the secondary pawl or pawls out ofaction, al-

though it plays no party in throwing the primary pawl'out of action aswill be evident having angularly'i disposed short and long,-

arms the short arm thereof having an adjustabledevice 59 which directlyengages the work while the'long arm is shown as provided at its freeend. with a device as the screw 60 for closing a normally open circuit.

The screw isadjustable so thatthe point at which the secondary pawls arethrown out of action can be governed. It might be stated at this pointthat the means whieh throw the secondary pawls out of action are causedto operate when said circuit is closed.

Said electric circuit involves'an electromagnet 61 into the-frame ofwhich is set an insulating bushin 62 to receive a metallic pin 63, said.bus ing rovidin a simple means for insulating sald magnet from theframework of the machine. shown at 64 and from said battery theconductor or wire'65 leads to said pin 63. Said wire is connected to oneend of said pin a.

short length of wire .66 leading from the other end of said pin to thecoils of said magnet a similar short length of wire 67 leading from thesaid coils to the armature lever68. The armature lever in the presentcase constitutes a latch and normally engages the shiftable member46'.to which I have hereinbefore alluded. From said armature lever awire 69 extends to ground which in the present case is through the.framework of the machine. The wire 65 extends from one pole of thebattery 64. From the other pole of said battery the wire 70 ex- ,tendsandleads tothe contact 71 sunnorted by and insulated from some suitablerelatively fixed part of the work-"carriage 3.

Said contact 71 is cooperative with a contact 72 carried at one end of-alever 73 also supported by said relatively fixed part of said carriagesaid lever havin a ground connection 74 and being limited by a suitablestop as 75. The electrical connections just described are best shown inFig. 2. The space between the contacts 71 and 72 constitutes the breakin the circuit and the feeler' 58 constitutes means for closingsaidcircuit. As the work isreduced in size, the longer arm of the feelerfalls thereby moving the screw 60 toward the contact 72 and at a certainpoint said lever 58 will operate the lever 73 so as to force the contact72 into engagement with the contact 71, this operation occurring whenthe work has been reduced in diameter to the,pred etermined size. Assoon as the circuit is closed the magnet 61 is energized and'att'ractsits armature '76 on-the lever 68 which it will be observed is pivotallymounted for swinging movement, between its ends in the casing or housing26 to which I have hereinbefore referred. When the magnet is energizedthe secondary pawls 9 and 10 are thrown out of action; It will beapparent therefore that while the primary pawl 8 is controlledindependently of the feeler 58 or some analogous device, the secondarypawl or pawls are not as they are thrown out of action by means governedby said feeler.

It will be remembered that the armature lever 68 has been described asconstituting a latch it engaging a partof the swing A batterv is forrocking motion by a bracket 78 rising from the housing or casing 26. Theswinging member 46 is shown provided with a spring-plunger 79, the sprinofwhich is denoted by 80 and the tip or said plunger normally bearsagainst the projection 81 on said bracket to maintain said spring 80under compression, it being evident that at this time the armature leveror latch 68 is hold ing said swinging member 46 against shiftingmovement by the spring 80. When the said armature lever or latch,however, is tripped themember 46 will be released so that the same canbe swung over from its normal position shown in Fi l to its shiftedosition represented in Fig. 3 the spring 80 Furnishing the power tosecure this funcary pawl throw-out or knock-ofi" device or a suitablemeans for putting the secondary pawls 9 and lOsimultaneously out ofaction, having for this purpose an actuator part 82 which may consist ofan arm rigid with the pinor stud 77. It will be remembered that themagnet 61 is energized at the time when the work has been ground topredetermined size and that when this takes placethe device46 is thrownover. During the swing of said part 46 under the action ofthe spring 80.the arm 8.2 is carried against the tail-piece 57 so as to lift thepoints of both pawls 9 and 10 from out of engagement with theratchet-wheel 6 the consequence being that further movement. of saidpawl automatically is at once arrested. When said part 46 is swun overby said spring 80 the stroke of the ormer-is sufficient to carry thescrew 45 out of the path 'of the projection or lug 46 so that when thefeeding mechanism is finally put out of actionthe ratchet-wheel 6 can berun forward or backward byhand'without interference or obstruction. Ahand-wheel for such pur pose is shown at 83 although it is not necessaryfor me to lllustrate any of the connections between the same and thefeed-mech anism. Owing to .the fact that the screw 45 is carried out ofthe path of the lug or projection' -16 there is no possibility ofdisturb ing a prior adjustment. 7

The armature 76 is mounted in a novel manner on the armature lever aswill now appear. From said armature 76 which'is made in the form of aplate, there extends a pin 84 the head of which is adapted to fitacountersink in the armature portion or end of said lever, said pin beingencircled by a comparatively weak push spring which by acting againstthe head of said pin holds said armature in its retracted position. -On

the energization of the magnet 61 the arma-- ture 76 is first attractedand is drawn away I I throw-out mechanism bushing as 88.

from the said lever until said armature is in the stron est portion ofthe field of said magnet at w ich time the lever. is drawn to itsshifted or releasing position, In. this manner while the action ispractically instantaneous the pull of themagnet is grad ual, z. 6., itis not suddenly ceded The lever 68 has a pin 86 driven into its head orarmature end and this in is notched to receive the tail portion citeswinging member 46; Said lever 68 is loosely mounted upon a pivot pin87 supported within the boxing '26 and insulat therefrom by a The tailportion of said lever is rovided with a laterally project ing ortion orhandle 89 by which the same can readily operated to effect the trippingof the seconda pawl knock-ofi or y hand or when desired such as would bethe case in'mounting a. gpge piece in position as hereinbefore stat Itwill be assumed that there are several pieces of work to be ground tothe same and a predeterminedsize. A gage-piece exactly agreeing in sizewith that of the work when finished is mounted on the tool carriage, thefinger or screw of the fecler -58 is placed against the periphery of thegage piece and the pawls their carriers 11 and12 and screw & are adusted as hereinbefore fully stated. 'With the feeler against'thegage-piece the screw is adjusted to a position to bring the contacts 7 2and 71 into engagement as this is 85 the-relation which ensues when. thefeeding mechanism is thrown out of action. The

- gagepiece is then dismounted and the work put into its place with thefeeler 58 against the same. The grinding then commences, thework-carriage Zlbeing reciprocated during grinding. its the carrier 11oscillates throu h the agency of said carriage and interme latemechanism as hereinbefore stated, the pawl 8 feeds the ratchet wheel 6and the 1 tool carriage is advanced toward the work a distancecorresponding to the movement of said ratchet-wheel. This actioncontinues until the shoe l2 lifts the pawl 8 out of ac tion and whenthis occurs the lug or projection 46 strikes against the adjustable stopor screw 45 thereby preventing further movement of thesaid shoe with theratchetwheel. The carrier 11, however, continues in motion so as tocause the rocking of the carrier 12 and thereby the operation of thepawls 9 and 10 and this will continue until the work is reduced to thedetermined extent at which point the feeler 58 will have caused thecontact 2 to engage the contact 71 and. thereby energize the magnet 61.\Vhen said magnet is energized the armature 68 is tripped therebyreleasing the springoperuble member 46 which on its swing projects thefixplger 82 thereon against the ponds 9 and 10 su cicnt to raise saidpawls clear of emcee said ratchet-whecl (S and at the same time can ricsthe stop d5 out of the path of the lug 46.

What T. claim is. 1. The combination of ratchet wheel mech anism,primary and secondary pawls tor 1 giving to said ratchet-wheel mechanismditlerent degrees of movement, and a device progressively movable withthe ratchetwheel mechanism for throwing the primary pawl out. of action.1

2. The combination of ratchetwheel mechanism, primary and secondarypawls for giving to the ratchet-wheel difierent demovable with saidratchet-wheel mechanism, for throwing said prima pawl out or action,said 7 device being a so manually settabl and means for preventing saidde-- vice moving beyond the point at which it throws said primary pawlout of action.

The combination of ratchet-wheel mechanism, primary and secondary pawlsfor iving to said ratchet wheel mechanism diferent degrees of movement,a device progressively movable with said ratchet-wheel mechanism, forthrowing the primary pawl out of action and also manually settable, andadjustable means for preventing said device from moving beyond the pointat which it throws said primary pawl out of action.

4. The combination of ratchet-wheel mechanism, primary andsecondary-.pawls for giving to the ratchet-wheel difierent degrees ofmovement, a device progressively movable with said ratchet-wheelmechanism, for throwing said primary pawl out of action and alsomanually settable, and a screw to prevent said device from moving beyondthe point at which it throws the primary pawl out of action.

5. The combination of ratchet-wheel mechanism, primary and secondarypuwls for giving to said ratchet-wheel mechanism different degtees ofmovement, a device progressively movable with said ratchet-wheelmechanism; for throwing said pawl out of recs of movement, a deviceprogressively action said;device being also manually settable,stop-means for preventing said device moving beyond the point at whichit throws said pawl out of action, and a movable support for said stepmeans.

6. The combination of ratchet-wheel mechanism, primary and secondarypawls for giving to said ratchet-wheel mechanism" ditt'erent degrees ofmovement, a device .progressively movable with said ratchet-wheelmechanism, for throwing said primary pawl out of action and alsomanually settuble, stop means for preventing. said device moving beyondthe point at which it throws said primary pawl out of action, anautomatically-movable support for said stop-means, and means fornormally preventing the movement of said automaticelly mpvplblevsupport.

7. The combination of a ratchet-wheel, a primary 'pawl for operatin saidratchet wheel, a plurality of secondary pawls for operating saidratchet-wheel, one ofsaid secondary pawls being set to operate inadvance of the other, means for ope ating said pawls and for giving totheprimary pawl a greater degree of movement than the secondary pa'wls,and meanstor throwin the primary pawl out of action at a prec eterminedpoint. 1 8. The combination of a ratchet-wheel, a primary pawl foroperating -said ratchetwheel, a. plurality of secondary pawls foroperating said ratchet-wheel, one of said secondary pawls being set tooperate in ad vance of the other, meansfor operating said 'pawls and forgiving to the primary pawl a greater degree ot movement than thesecondary pawls, means for throwing the primary pawl out OfziCt-IOI],and means for subsequently throwing the secondary pawls out of action. I

'9. The combination of a ratchet-wheel, a primary pawl for oieratlngsaid ratchet wheel, a plurality ot secondary pawls for also operatingsaid ratchet-wheel one of said secondary pawls being set to operate inadvance of the other and oneof them having a hole and the other a pin toenter said hole -to thereby connect said'sccondary pawls for relativemovement, means for operating said pawls and for giving to the primarypawl a greater degree of movement than the secondary pawls, and meansfor throwing the pri mary pawlout of action at a predetermined point.10. The combination of a ratehet-wlieeh'a primary pawl for operatingsaid ratchetwheel. a pair of secondary pawls for also operating saidratchet-wheel one of said secondary pa'wls being set- -to operate inadvance of the other, means for operating the several'pawls and forgiving to-the primary pawl a greater degree of movement than thesecondary pawls, means for throwing the primary pawl out of action atapre etermined point said means being progressively movable with saidratchet-wheel, and means for preventing the movement of said t-hrowingout means beyond the point at which said primary pawl is thrown ont' ofaction.-

11. The combination of an automaticallyactive, work-engaging feeler,primary and s condary feed mechanisms the primary feed mechanism havinga different degree of movement than the secondary feed mechanism,mechanism operable independently of the feeler for throwing the primaryfeed mechanism out of action at a predetermined point, and meansoperable bythe feeler for subsequently throwing the secondary feedmechanism out of action.

12. The combination of a ratchet-wheel, a

primary pawl for operating said ratchetwheel, a secondary pawl for alsooperating a said ratchet-wheel, means for operatingthe' said pawls andfor giving to the primary pawl a greater degree of movement than' thesecondary pawl, an automatically-activt.; work-engaging feeler, meansoperative independently of said feeler for throwin -the primary pawl outof action at a predetermined point, an electric circuit, means operablewith the feeler for controlling said circuit, and means for throwing thesecondary pawl out' of action, operated by and from said circuit whenthus controlled.

13. The combination of a ratchet wheel, a primary pawl 'for operatingsaid ratchet: wheel, a secondary pawl for also operating saidratchet-wheel,means for operating said pawls and for giving to theprimary pawl a greater degree of movement than the sec ondary pawl, andmechanism for throwing said pawls successively out of action fllldrffll'also regulating the interval between the times at which said pawls arethrown out of action.

14. The combination of a ratchet-wheel, a primary pawl for operatingsaid ratchetwheel, a secondary pawl fortalso operating saidratchetswhel, means for operating said pawls and for also giving to theprimary the secondary pawl, and mechanism .forthrowing the primary pawlout of action at a predetermined point and. for also regulatingthereafter the number of steps to be taken b the secondary pawl.

15. Tie combination of a'ratchet-wheel, primary and secondary pawls foroperating said ratchet wheels, carriers for sald pawls the carrier forone of the pawls serving to operate'the carrier for the other pawl, andmechanism for operating that carrier which operates the companioncarrier,

16. The combination of ratchet-wheel" mechanism, primary and' secondarypawls for operating said ,ratchet-wheeli mechanism, carriers for thepawls the carrier for the primary pawl serving to operate the carrierforthe'secondgry'pawl, mechanism for operating the primary pawl carrier,and means for throwing the; pawls successively out of action. I i

17. The combination of ratohet-wheel mechanism, primary and secondary.pawls for operating said ratchet-wheel'mechanism, a carrier for theprimary pawl, a carrier for the secondary pawl, operable by the othercarrier, mechanism for operating the primary pawl carrier, andmc'ans forthrowing the primary pawl out ozt action without stopping .the motionthe primary pawl carrier. 1 t i V 18. The combination of ratchetwheelmechanism, primary and secondary pawls for operating said ratchet-wheelmechanism, a carrier for the primary pawl, a carrier for isci . thesecondary pawl, operable by the'other carrier, mechanism fonoperatingthe primary pawl carr1er,-n'ieans for throwmg the primary pawl. out ofaction without stopping the motion otthe primary pawl car-- rler, andmeans for subsequently throwing the secondary pawl out of action.

19. The combination of aratchet-wheel, a primary pawl for operating'saidratchet wheel, a secondary pawl for-also operating said ratchet-wheel, acarrier for the primary pawl, a carrier for the secondary pawl, operableby the other carrier, means tor operating the primary pawl carrier,means for throwing the primary pawl out of action without stopping themotion of the primary pawl carrier, and means for preventing themovement of said throwing out means beyond the'point at-which the samethrows said primary pawl out of action.

20. The combination of a ratchet-wheel, a primary pawl for operatingsaidratchetwheel, a secondary pawl for also operating said ratchet-wheel, acarrier for the primary pawl, a carrier for the secondary pawl, operableby the other carrier, means for operating the primary pawl carrier,means 'for throwing the primary pawl out of action without stopping themotion of the primary pawl carrier, means for subsequently throwing thesecondary pawl out of action, and means for preventing the movement ofsaid throwing outmeans beyond the point at which the same throws saidprimary pawl out of action. I

primary pawl for operating said ratchetwheel, a secondary pawl for alsooperating said ratchet-wheel, a pair of carriers for the primary andsecondary pawls oscillatory with respect to and about the axis of saidratchet-wheel, the secondary pawl carrier being operable by the primarypawl carrier, mechanism for operating the primary pawl carrier. andmeans progressively movable with the ratchet-wheel for throwing theprimary pawl out of action at a predetermined point.

22. The combination of an automaticallyactivc;work-engaging feeler,primary and secondary feed mechanisms, means operable by said primaryand secondary feed mechillllH'llS said mechanisms being operable to giveto said means different degrees of movement. means for throwing theprimary feed mechani m out of action at'a predetermined point. and meansfor preventing said throw ire out means from moving beyond the posit atwhich the same throws said primary feed mechanism out of action.

'3 The comliination of a ratchet-wheel,

pawl tor operating said ratchet-wheel. a ..:\'ice for throwing the pawlout of action a predetermined point and progressively movable with saidratchet-wheel, means for emcee.

preventing said throwing out device moving beyond the point at whichitthrowsthe pawl O'tlt'flf action, and a movable support for said lastmentioned means.

"24. Th9 combinationof a ratchet-wheel,

a primary-pawl for operating said ratchetwheel,'a secondary pawl foralso operating vsaidratchet-wheel, a carrier for the primary withoutstopping the carrier therefor, and

means'for preventing the movement of said device beyond the polnt atwhich it throws said device out of action and movably mounted.

25. The combination of a ratchet-wheel, a primary pawl for operatingsaid ratchetwheel, a secondary pawl for also operating saidratchet-wheel, a carrier for the primary pawl, a carrier for thesecondary pawl, operable by the other carrier, means for operating theprimary pawl carrier, throw out means. for throwing the primary pawl outof action at a predetermined point, progressively'movable with theratchet wheel and also manually settable, stop means for preventing themovement of said throw out means beyond the point at which the samethrows said primary pawl out of action, a. movably mounted,automatically active devilpe supporting said stop means, and means fornormally preventing the movement of said automatically active device.

26. The combination of a ratchet-wheel, a primary pawl for operatingsaid ratchetwheel a secondary pawl for also operating saidratchet-wheeh'carriers for the primary 'and secondary pawls bothoscillatory and the carrier for the secondary pawl being operable by thecarrier for the primary pawl, means for operating the primary pawlcarrier, a device progressively movable with said ratchet wheel forthrowing the primary pawl out of action, an automatically'active,

BENGT M. W. HANSON.

Vitnesses:

W. M. S'roRas, W. H. MILLER.

